首页
登录
职称英语
A project likely to evolve in the near or intermediate future is spacetouri
A project likely to evolve in the near or intermediate future is spacetouri
游客
2023-11-24
51
管理
问题
A project likely to evolve in the near or intermediate future is space
tourism. Today space tourism has become a pure commercial activity【S1】________
that would not have to rely unpredictable government decisions. It would【S2】________
therefore put space operations on a much more solid, dependable footing
and would enormously expand man’s space activity. If some people see【S3】________
space tourism as a potential multibillion—dollar business, difficult
technical problems remain to be solved.
First, in order to fulfill the dream of space tourism, a manned
reusable rocket like the Venture Star must be built. Then, the second【S4】________
serious problem must be addressed:Even today’s most—advanced space
rockets are able to lift only about 2. 5%of their launch weight into
0rbit—a ratio that has hardly changed in the last 40 years. But it is【S5】________
simply impossible to find other alternations other than a rocket. This【S6】________
unsatisfying fact is a result of the limits of material characteristics and
chemical power sources, and there is no indication which any【S7】________
fundamental breakthrough call be expected in these areas in the
foreseeable future. Then these who have long-cherished dreams of space【S8】________
tourism have to Wait forever.
Operational costs may be somewhat reduced by the use of air-
breathing engines to help a reusable rocket penetrate into the earth’s
atmosphere. Today the highest cost attainable to lift a payload into orbit【S9】________
is more than$4, 000 per pound;the price of a ticket to space would
have to be at least$50. 000. It is questionable whether a sufficient
number of customers could be tempted to pay SO a high price for a short【S10】________
trip around the world. [br] 【S6】
选项
答案
alternations—alternatives
解析
形近词误用。alternation表示“交替,轮流,间隔”,alternative表示“可供选择的事物”,此处说“找不到可以替代火箭的东西”,因此用alternatives。
转载请注明原文地址:http://tihaiku.com/zcyy/3214071.html
相关试题推荐
PassaqeTwo(1)Oneoftheobviousproblemswithpredictingthefuture
PassaqeTwo(1)Oneoftheobviousproblemswithpredictingthefuture
PassaqeTwo(1)Oneoftheobviousproblemswithpredictingthefuture
PassageFour[br]WhatseemstobeaneffectofthepilotprojectinSpain?T
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
PeoplewhohaveInternetaccessathomearemorelikelytobeinarelation
Predictingthefutureisariskybusinessforascientist.Itissafetosay
Predictingthefutureisariskybusinessforascientist.Itissafetosay
随机试题
[originaltext]M:Youknowwhat,Michaeltoldmetheotherdaythathegotasec
[originaltext]Sayyougetintobed,preparedforahealthysevenoreighth
网络社区营销的缺陷和不足体现在( )上。A.广告投放的精准度 B.营销效果的
柴胡的现代应用不包括A.风湿性关节炎 B.病毒性肝炎 C.高脂血症 D.流
未竣工的房地产项目进入市场销售需要符合()条件。A:封顶 B:验收 C:预
长期以来,人们对工业的文化内涵没有认识,文物保护的理念相对落后,事实上,每项工
西欧有一句名谚:“中国人的头,阿拉伯人的口,法兰西人的手。”结合对古代科技史的理
(2020年真题)某商业建筑设置的火灾自动报警系统在投入使用后,3层餐厅厨房的某
甲外商投资企业的业务收支以欧元为主,兼有少量人民币业务。下列关于甲企业记账本位币
A.血间接胆红素增高、贫血、网织红细胞增高 B.血间接胆红素增高、贫血、网织红
最新回复
(
0
)